好来了，别说我不给你面子啊，软阴影+多重光源，看仔细了

http://photo8.yupoo.com/20070704/130238_1670906934_bgnoapos.jpg

阴影的重叠表现
http://photo6.yupoo.com/20070704/130239_1972797969_lgegxjmf.jpg

被破坏物体的阴影表现
http://photo8.yupoo.com/20070704/130241_1122086383_dbgyvqat.jpg

被破坏物体远离光源的阴影表现，明显变淡
http://photo6.yupoo.com/20070704/130242_876042624_bfmupooq.jpg

多光源下的阴影表现
http://photo8.yupoo.com/20070704/130243_1086533_jzusjnvc.jpg

近距离让你看仔细点